:root{
  --ink:#071827;
  --muted:#36506a;
  --blue:#1e76ff;
  --cyan:#21cfff;
  --mint:#93f2c4;
  --line:rgba(7,24,39,.12);
  --card:rgba(255,255,255,.78);
  --shadow:0 30px 90px rgba(29,113,210,.16);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:linear-gradient(135deg,#eefcff 0%,#e7f5ff 45%,#dceaff 100%);overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.flight-page{min-height:100vh;background-image:radial-gradient(circle at 15% 5%,rgba(33,207,255,.34),transparent 26%),radial-gradient(circle at 86% 12%,rgba(30,118,255,.18),transparent 30%),linear-gradient(rgba(255,255,255,.23) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.23) 1px,transparent 1px);background-size:auto,auto,72px 72px,72px 72px}
.flight-wrap{width:min(1160px,calc(100% - 36px));margin:0 auto}
.flight-header{padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:24px}
.flight-brand{display:flex;align-items:center;gap:13px;font-size:25px;font-weight:950;letter-spacing:-.04em}
.flight-brand img{width:46px;height:46px;border-radius:15px;box-shadow:0 14px 32px rgba(30,118,255,.24)}
.flight-nav{display:flex;gap:10px;flex-wrap:wrap}
.flight-nav a{padding:12px 18px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.58);font-weight:900;color:#102f4d;box-shadow:inset 0 1px 0 rgba(255,255,255,.7)}
.flight-hero{padding:54px 0 84px;display:grid;grid-template-columns:minmax(0,1fr) minmax(330px,455px);gap:70px;align-items:center}
.flight-copy{padding:44px 48px;border-radius:36px;background:var(--card);border:1px solid rgba(255,255,255,.76);box-shadow:var(--shadow);backdrop-filter:blur(18px)}
.flight-copy h1{margin:0;font-size:clamp(32px,4vw,64px);line-height:1.05;letter-spacing:-.09em}
.flight-copy p{margin:26px 0 0;color:var(--muted);font-size:21px;font-weight:850;line-height:1.9}
.flight-buy{display:inline-flex;align-items:center;gap:12px;margin-top:18px;padding:17px 30px;border-radius:18px;background:linear-gradient(135deg,#ff7a1a,#ff3f3f);color:#fff;font-size:19px;font-weight:950;box-shadow:0 18px 38px rgba(255,91,38,.28)}
.flight-buy:after{content:"";width:9px;height:9px;border-right:3px solid currentColor;border-top:3px solid currentColor;transform:rotate(45deg)}
.flight-logo-card{margin:0;justify-self:center;width:min(100%,455px);aspect-ratio:1;border-radius:44px;padding:34px;background:linear-gradient(145deg,rgba(255,255,255,.78),rgba(222,242,255,.72));border:1px solid rgba(255,255,255,.82);box-shadow:var(--shadow);display:grid;place-items:center;position:relative;overflow:hidden}
.flight-logo-card:before{content:"";position:absolute;inset:28px;border:1px dashed rgba(30,118,255,.22);border-radius:34px}
.flight-logo-card:after{content:"官方直售";position:absolute;right:26px;bottom:25px;padding:10px 14px;border-radius:999px;background:#071827;color:#fff;font-size:14px;font-weight:900;letter-spacing:.08em}
.flight-logo-card img{width:76%;height:76%;object-fit:cover;border-radius:34px;box-shadow:0 28px 54px rgba(30,118,255,.22)}
.section{padding:70px 0}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:26px}
.section-title h2{margin:0;font-size:clamp(34px,5vw,58px);letter-spacing:-.06em;line-height:1}
.section-title p{margin:0;max-width:560px;color:var(--muted);font-size:18px;font-weight:800;line-height:1.8}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.product-card{padding:24px;border-radius:28px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 45px rgba(7,24,39,.08)}
.product-card .flag{display:grid;place-items:center;width:70px;height:70px;border-radius:22px;background:linear-gradient(135deg,#eaf8ff,#d8efff);color:var(--blue);font-size:23px;font-weight:950;margin-bottom:18px}
.product-card h3{margin:0 0 8px;font-size:24px}
.product-card p{margin:0 0 16px;color:var(--muted);font-weight:800;line-height:1.7}
.product-card a{display:inline-flex;padding:10px 18px;border-radius:999px;background:#eef6ff;color:var(--blue);font-weight:950}
.download-panel{display:grid;grid-template-columns:330px 1fr;gap:22px}
.download-head{padding:32px;border-radius:30px;background:#071827;color:#fff;box-shadow:var(--shadow)}
.download-head h2{margin:0;font-size:44px;line-height:1.05}
.download-head p{margin:18px 0 0;color:rgba(255,255,255,.76);font-weight:800;line-height:1.8}
.download-list{display:grid;gap:14px}
.download-list a{display:grid;grid-template-columns:86px 170px 1fr;gap:20px;align-items:center;padding:22px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:0 15px 36px rgba(7,24,39,.06)}
.download-list b{display:grid;place-items:center;width:74px;height:44px;border-radius:16px;background:linear-gradient(135deg,#21cfff,#93f2c4);color:#fff}
.download-list strong{font-size:22px}
.download-list span{color:var(--muted);font-size:15px;font-weight:800;line-height:1.8}
.install-grid,.faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.install-grid article{padding:28px;border-radius:28px;background:linear-gradient(180deg,#fff,#f5fbff);border:1px solid var(--line);box-shadow:0 15px 42px rgba(7,24,39,.07)}
.install-grid mark{display:inline-grid;place-items:center;width:54px;height:54px;border-radius:18px;background:var(--blue);color:#fff;font:900 20px/1 Arial;margin-bottom:24px}
.install-grid h3{margin:0 0 12px;font-size:24px}
.install-grid p{margin:0;color:var(--muted);font-weight:800;line-height:1.8}
.faq-grid details{padding:24px;border-radius:24px;background:#071827;color:#fff}
.faq-grid summary{cursor:pointer;font-size:19px;font-weight:950}
.faq-grid p{color:rgba(255,255,255,.74);font-size:15px;font-weight:800;line-height:1.8}
.flight-footer{padding:34px 0 44px;border-top:1px solid var(--line);display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:24px;color:var(--muted)}
.flight-footer strong{display:block;color:var(--ink);font-size:24px;margin-bottom:10px}
.flight-footer p{margin:0;font-size:14px;font-weight:800;line-height:1.8}
.flight-footer nav{display:grid;grid-template-columns:repeat(2,max-content);gap:12px 28px;font-weight:900}
@media (max-width:920px){
  .flight-header{align-items:flex-start;flex-direction:column}
  .flight-nav{width:100%;overflow:auto;flex-wrap:nowrap;padding-bottom:8px}
  .flight-nav a{white-space:nowrap}
  .flight-hero{grid-template-columns:1fr;gap:26px;padding-top:26px}
  .flight-logo-card{justify-self:stretch}
  .section-title{display:block}
  .section-title p{margin-top:14px}
  .product-grid,.install-grid,.faq-grid,.flight-footer{grid-template-columns:1fr}
  .download-panel{grid-template-columns:1fr}
}
@media (max-width:540px){
  .flight-wrap{width:min(100% - 24px,1160px)}
  .flight-copy{padding:28px 20px;border-radius:28px}
  .flight-copy h1{font-size:40px}
  .flight-copy p{font-size:17px}
  .flight-buy{width:100%;justify-content:center}
  .flight-logo-card{border-radius:28px;padding:22px}
  .product-grid{gap:12px}
  .download-list a{grid-template-columns:1fr}
  .flight-footer nav{grid-template-columns:1fr 1fr}
}